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<?php namespace Foo; function autocreate($classname) { if (substr($classname, -strlen('Exception')) == 'Exception') eval('class ' . $classname . ' extends Exception {};'); } spl_autoload_register('Foo/autocreate'); $x = new TestException(); var_dump(get_class($x)); $x = new Foo\TestException(); var_dump(get_class($x));

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